Bug#845187: systemd: pressing ctrl-alt-delete repeatedly to force immediate reboot leads to systemd getting stuck with something

[Martin Steigerwald]

Package: systemd
Version: 232-5
Severity: normal

Dear Martin, dear Michael, dear Maintainers-

I noticed by pressing Ctrl-Alt-Delete repeatedly quickly at the 90 seconds
timeout for stopping a service that didn´t seem to agree with being stopped
at shutdown that systemd did initiate an immediate reboot.

This does no longer work. Systemd still says it triggers an immediate reboot
but then seems to be stuck. I waited for a while but there was not output.

I could let it sit for a little more and also provide a screenshot of what
is displayed on screen, what I have seen so far didn´t give me a hint what is
getting stuck there.

Maybe there is some debugging stuff I can activate before doing so? If so,
can I also tell systemd to store the debugging stuff in a while before
actually shutting down the laptop? Otherwise important information may have
been scrolled out of the visible screen already.

Thank you,
Martin

-- Package-specific info:

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.8.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages systemd depends on:
ii  adduser         3.115
ii  libacl1         2.2.52-3
ii  libapparmor1    2.10.95-6
ii  libaudit1       1:2.6.7-1
ii  libblkid1       2.29-1
ii  libc6           2.24-5
ii  libcap2         1:2.25-1
ii  libcryptsetup4  2:1.7.3-2
ii  libgcrypt20     1.7.3-2
ii  libgpg-error0   1.25-1
ii  libidn11        1.33-1
ii  libip4tc0       1.6.0+snapshot20161117-1
ii  libkmod2        23-1
ii  liblz4-1        0.0~r131-2
ii  liblzma5        5.2.2-1.2
ii  libmount1       2.29-1
ii  libpam0g        1.1.8-3.3
ii  libseccomp2     2.3.1-2.1
ii  libselinux1     2.6-3
ii  libsystemd0     232-5
ii  mount           2.29-1
ii  util-linux      2.29-1

Versions of packages systemd recommends:
ii  dbus            1.10.12-1
ii  libpam-systemd  232-5

Versions of packages systemd suggests:
ii  policykit-1        0.105-17
ii  systemd-container  232-5
ii  systemd-ui         3-4

Versions of packages systemd is related to:
pn  dracut           <none>
ii  initramfs-tools  0.125
ii  udev             232-5

-- Configuration Files:
/etc/systemd/resolved.conf changed [not included]

-- no debconf information